They came upon me as a wide breaking in of waters: in the desolation they rolled themselves upon me. They came upon me as a wide breaking in - They storm me on every side.
In the desolation they rolled themselves - When they had made the breach, they rolled in upon me as an irresistible torrent. There still appears to be an allusion to a besieged city: the sap, the breach, the storm, the flight, the pursuit, and the slaughter. See the following verse, Job 30:15 (note).